#include <iostream>
using namespace std;

int main()
{
	int a = 2, b = 5;
	//cin >> a >> b;
	cout << a + b <<endl<< a * b << endl;
	cout << "Hello world!" << endl;
	cout << "The sum of " << a << " and " << b << " is " << a + b << endl;
	
	cout << "/*";
	cout << "*/";
	//cout << /*"*/"*/;
	cout << /*"*/"/*"/*"*/;
	int sum = 0;
	for (int i = -100; i <= 100; i++)
	{
		sum += i;
	}
	cout << endl << sum << endl;
	sum = 50;
	int l = 50, q = 50;
	while(l--)
	{
		++q;
		sum += q;
	}
	cout << "----" << sum << endl;

	return 0;
}